<template>
  <div>
    <!-- 顶部滑动条 -->
    <div id="slider" class="mui-slider">
      <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
        <div class="mui-scroll">
          <a :class="['mui-control-item',item.id==0?'mui-active':'']" v-for="item in cates" :key="item.id" @tap="getPhotoListByCateId(item.id)">
            {{item.title}}
          </a>
        </div>
      </div>
    </div>

    <!-- 图片列表区域 -->
    <ul class="photo-list">
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag="li">
        <img v-lazy="item.img_url">
        <div class="info">
          <h1 class="info-title">{{item.title}}</h1>
          <div class="info-body">{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>

<script>
// 1. 导入 mui 的js文件
import mui from "../../lib/mui/js/mui.min.js"
export default {
  data() {
    return {
      cates: [],
      list: []
    }
  },
  created() {
    this.getTitles();
    this.getPhotoListByCateId(0);
  },
  mounted() {

    // 2. 初始化滑动控件
    mui('.mui-scroll-wrapper').scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  },
  methods: {
    getTitles() {
      this.$http.get("api/getimgcategory").then(result => {
        if (result.body.status === 0) {
          result.body.message.unshift({ title: "全部", id: 0 });
          this.cates = result.body.message;
        }
      })
    },
    getPhotoListByCateId(cateId) {
      this.$http.get("api/getimages/" + cateId).then(result => {
        if (result.body.status === 0) {
          this.list = result.body.message;
          for (var i = 0; i < this.list.length; i++) {
            this.list[i]['img_url'] = require('../../uploads/b' + parseInt(Math.random() * 15 + 1) + '.jpg');
          }
        }
      })
    }
  }
}
</script>

<style lang="scss" scoped>
* {
  touch-action: pan-y;
}
.photo-list {
  list-style: none;
  margin: 0;
  padding: 10px;
  padding-bottom: 0;
  li {
    background-color: #ccc;
    text-align: center;
    margin-bottom: 10px;
    box-shadow: 0 0 9px #999;
    position: relative;
    img{
      width: 100%;
      vertical-align: middle;
    }
    img[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }
    .info{
      color: white;
      text-align: left;
      position: absolute;
      bottom: 0px;
      background-color:rgba(0,0,0,0.4);
      max-height: 84px;
      .info-title{
        font-size: 14px;
      }
      .info-body{
        font-size: 13px;
      }
    }
  }
}
</style>
